Trifa Kamal Farkha1 & Adil Othman Fatah1
1Faculty of Science and Science education-University of Sulaimani, Kurdistan Region of Iraq
Original: 01.07.2015; Revised: 22.10.2015; Accepted:28.01.2016; Published online: 20.06.2016
The Phytoplankton species composition have been studied at eight stations from four selected streams: Tabin, Charmaga, Chamirezan and Surqawshan in Dukan basin within Sulaimani district during August 2010 to July 2011. Some physical and chemical properties of the streams water were determined. Air and water temperature values were varied between (3 to 43 oC) and (5 to 29 oC) ,respectively. Upon investigation, the pH range of the sites was 7-9.4 indicating alkalinity of the water bodies. Calcium concentrations always dominated over the other ions. Calcium values were varied between (10 to 74 mg/l). Sodium and potassium concentration ranged between (0.66 to 16.5 mg/l) and (0.3 to 3.4 mg/l) respectively. Chloride concentrations never fall below 10 mg/l and never exceed 58 mg/l. throughout the studied period. A total of 136 phytoplankton taxa were identified which belong to six divisions , the majorities were belonged to Bacillariophyta (92 taxa), making up 67.65 % of the total, followed by Chlorophyta (19 taxa), making up 14.7 %, Cyanophyta (19 taxa) which make up 14 %,( 2 taxa) for each of Pyrophyta and , Euglenophyta and (1 taxon) of chrysophyta make up 3.75% . The most diverse genera that were investigated in this study were: Navicula (13 taxa) ,Nitizschia (15 taxa),Fragilaria(9 taxa) , Cymbella and Gomphonema (8 taxa).
Surface water, Dukan basin, Physico-chemical parameters, Phytoplankton